LT3935

4

Rev. 0

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l

denotes the specifications which apply over the full operating

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

RT Pin Current Limit

34

µA

SYNC/SPRD Threshold

1

2

V

SYNC/SPRD Pin Current

−100

100

nA

Soft-Start

SS Pin Charging Current

20

µA

SS Pin Discharging Current

1.25

µA

SS Lower Threshold (Falling)

200

mV

SS Higher Threshold (Rising)

1.7

V

Fault Detection

Open-Circuit Threshold (FB Rising)

l

930

950

975

mV

Open-Circuit Falling Hysteresis

55

mV

Short-Circuit Threshold (FB Falling)

l

180

200

220

mV

Short-Circuit Rising Hysteresis

50

mV

FAULT Pull-Down Current

100

µA

FAULT Leakage Current

−100

100

nA

Overvoltage Protection

FB Overvoltage Threshold (FB Rising)

1.050

V

FB Overvoltage Falling Hysteresis

48

mV

LED Current Monitor

ISMON Voltage

0.950

80

1.000

100

1.030

120

V

mV

PWM Driver

PWM Threshold (Rising)

1.7

V

PWM Pin Current

−100

100

nA

RP Pin Current Limit

60

µA

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: Do not apply a positive or negative voltage source to these pins,

otherwise permanent damage may occur.

Note 3: Specifications over the −40°C to 125°C operating junction

temperature range are assured by design, characterization and correlation

with statistical process controls. The The LT3935R is guaranteed over the

−40°C to 150°C operating junction temperature range. Operating lifetime is

derated for junction temperatures greater than 125°C.

Note 4: This IC includes overtemperature protection that is intended to

protect the device during momentary overload conditions. The maximum

rated junction temperature will be exceeded when this protection is active.

Continuous operation above the specified absolute maximum operating

junction temperature may impair device reliability or permanently damage

the device.

Note 6: The MIN on and off times are guaranteed by design and are not

tested.